i have a 20 hp gdlt and i was wondering what is the biggest/most hp engine you can place on my gdlt frame?

35 hp

Well, yes you can put a 35 on there but you are gonna have to modify the frame for the new motor. The bolt patterns will be different which is not that big of a problem, drill you some holes that'll work for the mount. The problem I see with putting that big of an engine on that frame is the shaft size. the 20hp honda has a 3/4" drive shaft and the 35hp has a 7/8". You can still bolt it up but I'd carry an extra drive shaft and a tool chest to change it in the field cause your gonna snap em. also you will need to reprop your motor.

Good deal yall thanks... Do yall know off the top of your head what's the highest I can go without having to worry about the shaft breaking

Nope but if your worried about the shaft breaking u can always put a 27 on. Or a 23

If you can buy a surface drive you would probly be better off in the long run.

aint that the truth i wish i could afford one...any know what the going price for a 2001 gdlt is?

Hey what kinda speed you gettin outa that 1542 war eagle with the 20 on it? I got the same boat with a kohler 25 gdlt and ive topped out at 21.3 in open water.

Your gonna need some more money to go faster

as of right now like 12 of 13, i have to get a new prop or something bc its almost embarrassing how slow im going...i just bought a tiny tach so hopefully after hooking that up ill see what the problem is for going so slow

Load distribution plays a big part in speed with a longtail, I can move a tool box to the front or slide the crankin battery a little over and gain a mph or two.

I have a 13 and without much load i can bump 15-16.

talking about load distribution...ive been thinking of moving my gas tank to the front of my help my boat plane out easier...opinions?

yes, right at the start of the rake.. It will help some.

ok i really appreciate it man thank you

When I put exhaust on my 23 go devil I gained a mph.

tm, a buddy o mine is tryin to get rid of a 35 long tail.prolly got less than 50 hrs on it.he askin 3500,i believe.in your neck of woods too,georgia.

thank yall for all of your help i have taken and used all of your advise and it has helped a lot after putting the new prop on i am being able to go 5 to 7 miles an hour faster which a tremendous difference than what i was going...i have shifted around benches to closer to the front of my boat and ended up being able to make a platform on the front of my boat and now my boat planes out much easier...too bad i have done all this work and have to really test it next duck season...guess ill have to find some good places to fish...i will post pics as soon as i can find a camera haha